Radius tool



7 April 17, 1928. 1,666,109

A. SHEBERASHENKO RADIUS TOOL v Filqd April 10. 1925 Patented Apr. 17, 1928.

ANDREY SHEBERASHENKO, OF DETROIT, MICHIGAN.

. RADIUS TOOL.

Application filed A ril 10, 1925. Serial No. 22,1.

My invention relates to radius tools adapted to be supported in a suitable tool post, shown in the accompanying drawings and more particularly described 1n the following specification and claim.

The object of my invention is to provide a device adapted to be supported 1n a tool post in which the cutting tool maybe ac curately adjusted to cut radial peripheral 1 grooves of varying width-the construction being such that by the aid of a micrometer an accurate adjustment of the cutting tool may be obtained-t0 secure grooves of any re uired size.

further object of the invention is to provide a tool of inexpensive construction,

simple in operation and not apt to wear dly, or get out of order.

proceeds the invention further resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed it being understood that changes may be made in the precise embodiment of the invention herein disclosed without de 'arting from the spirit of the same.

In t e drawings accompanying this specification:

Figure 1 is a vertical cross-sectional view through the device mounted in a lathe tool post of usual construction.-

Figure 2 is a plan view of the device supported in a tool post-a fragment of the post being indicat in horizontal section.

Figure 3 1s a vertlcai cross-sectional vlew with parts in elevation, taken on or about line 3-3 of Figure 1.

Referring now to the letters of reference 40 placed upon the drawings: 7 The tool stock A is provided with a lateral projecting shank A supported in a tool post B by a set screw B projecting downwardly from the top of the post. The tool stock has a bore A to receive a spindle C having an enlarged head Cwith a gear CFbdow-seated against an annular shoulder A in the tool stocksurrounding the bore.

e0 The'lower projecting-end of the spindle is maintain the parts in proper position.

th the foregoing and other objects in- 120 view which will appear as the description radii-fer example, a radius of two inches,

crank arm I through .the rotation of the relatively smaller in diameter thanthe bore through the tool stock and is screw-threaded and tted with a nut D and washer D overlapping the end of the tool stock to.

The enlarged head C of the spindle has a transverse hole 0 to receive a cutting tool E, which may be' accurately adjusted by a set-screw F fitted in the end of the transverse hole, before securing the tool by the bolt G screwed into the head of the spindle.

In mesh with the gear C is a gear H fitted upon the end of a shaft I-I journalled in a bore extending longitudinally through the shank A itsproj ecting end being fitted with awasher H pinned to the shaft and a suitable crank arm I, for manually operating the gear, secured by a pin-and nut to the shaft.

'J is a block attached to the laterally proback of the cutting tool. To determine the necessary-adj ustment of the cutting tool to secure any predetermined II a suitable micrometer is employed in conjunction with the tool and adjusted to extend from the end of the cutting tool E to the edgeof the block J-the micrometer reading being two inches plus the radii of the tool stock. The cuttiug tool being adjusted for a predetermined radius, it-is secured in the rotatablespindle by the set screw G, and may be actuated by the gears H and C"v carried by the respective spindles.

Having thus described my invention what I claim is:

'A radius tool comprising a tool stock hav-' ing a laterally projecting shank and provided therein with a longitudinal bore extending from 'one end of the shank and terminating at the tool stock interiorly thereof, said tool stock being provided with a vertical bore intersected by thesaid longitudinal bore and enlarged at its upper end, the enlarged end being surrounded by an. annular shoulder, a vertical spindle having an enlarged head seated on the annular 1 0 shoulder of the stock and fitting in the enlargediportion of the vertical bore and entirely lling the same and provided at its lower face below said annular shoulder with 5 a horizontal gear, a horizontal spindle mounted in the longitudinal bore and provided at its inner end with a, gear meshing 

